{
  "manageEntity": {
    "action": "Save",
    "entityId": "285509",
    "entityType": "Track",
    "nonce": "0xaebd41f880bb14a0926aacdd32a94c60c97c040762925f088bf8c378081167dd",
    "signature": "0x2ceec0968ca4cedad0dcaae25e48929c185d40545f1c0ae709251275157eb2903a2b888c891e61514b88a5f11aa2d801e72cb626d6cd851a57993635fe0ab0ec1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}